My apple/peach cider is just over the one week mark in fermentation. I used 4 gallons of apple juice and one gallon of peach nectar however. I use table sugar and my ciders come out just fine (or to my taste anyway). I planned on back sweetening it a bit with some white grape/peach concentrate...
I have tried this before since much like you, I had a soda stream and nothing to do with it. The carbonation didn't really last long after removing the 1L bottle of my cider. I've tried more carbonation and still it didn't meet my expectations. I was even hoping to carb it up and transfer to...